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  <title>pid_handler (trafmonitor.rb)</title>
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  <pre><span class="ruby-comment cmt"># File trafmonitor.rb, line 13</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">pid_handler</span>( <span class="ruby-identifier">pidfile_path</span> )
    <span class="ruby-identifier">$LOG</span>.<span class="ruby-identifier">debug</span> <span class="ruby-keyword kw">do</span> <span class="ruby-value str">&quot;Checking for pidfile existence.&quot;</span> <span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">$DEBUG</span>

    <span class="ruby-keyword kw">if</span>  <span class="ruby-constant">File</span>.<span class="ruby-identifier">exist?</span>( <span class="ruby-identifier">pidfile_path</span> )
        <span class="ruby-identifier">$LOG</span>.<span class="ruby-identifier">fatal</span> <span class="ruby-keyword kw">do</span> <span class="ruby-node">&quot;Is trafmonitor already running? Check #{pidfile_path}. Terminating.&quot;</span> <span class="ruby-keyword kw">end</span>
        <span class="ruby-identifier">exit</span> <span class="ruby-value">1</span>
    <span class="ruby-keyword kw">else</span>
        <span class="ruby-identifier">$LOG</span>.<span class="ruby-identifier">debug</span> <span class="ruby-keyword kw">do</span> <span class="ruby-node">&quot;Writing pidfile #{pidfile_path}.&quot;</span> <span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">$DEBUG</span>
        <span class="ruby-constant">File</span>.<span class="ruby-identifier">open</span>( <span class="ruby-identifier">pidfile_path</span>, <span class="ruby-value str">'w+'</span> ) { <span class="ruby-operator">|</span><span class="ruby-identifier">fh</span><span class="ruby-operator">|</span> <span class="ruby-identifier">fh</span>.<span class="ruby-identifier">puts</span> <span class="ruby-constant">Process</span>.<span class="ruby-identifier">pid</span> }
    <span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span></pre>
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